微信公众号之分享接口服务器端

前言

我们会发现一些微信公众号中的网站，他们有的分享出去标题以及摘要是自定义的，那么这就是用到了分享接口

1、h5需要的数据实体类

import lombok.Data;
import lombok.experimental.Accessors;

import java.util.Date;

/**
 * 作者 ：HealerJean
 * 日期 ：2018/12/17  下午7:11.
 * 类描述：
 */
@Data
@Accessors
public class ResJsApiTickeData {

    private String appId ; //微信公众号id

    private Long timestamp ;//时间戳

    private String  nonceStr; //随机字符串

    private String  signature ; //签名

}

2、获取JSapi中的ticket

    /**
     * @Desc: JsapiTicket
     * @Date:  2018/5/24 下午6:50
     */

    public  static String getJsapiTicket( WeChatBusinessNo weChatBusinessNo){

        WeChatJsApiTicket weChatJsApiTicket =jsSdkUtils.getWechatJsapiTicket(weChatBusinessNo.getId());

        if(weChatJsApiTicket !=null){ //先判断数据库中有没有
            return weChatJsApiTicket.getJsTicke();
        }

        String accessToken =  AccessToakeUtil.getAccessToaken(weChatBusinessNo);
        String url = WechatApiUrlParams.JS_API_TICKET_URL.replace("ACCESS_TOKEN", accessToken) ;
        HttpBackBean httpBackBean = HttpHelper.handleGet(url,null,null, HttpHelper.OVERTIME);

        log.info("获取 accessToken 返回结果"+httpBackBean.getResult());
        String jsTicket = JSONObject.fromObject(httpBackBean.getResult()).getString("ticket");
        if(jsTicket!=null){
            jsSdkUtils.saveWechatJsapiTicket(jsTicket, weChatBusinessNo.getId()); //向数据库中保存accessToaken
            return  jsTicket;
        }else {
            log.error("获取accessToken失败");
        }

        return null;
    }
    

3、根据前台传来的url制作签名

    public ResJsApiTickeData getSignature(String url, String key){

        ResJsApiTickeData data = new ResJsApiTickeData() ;

        WechatWebKey wechatWebKey = wechatWebKeyRepository.findByWeChatWebKey(key);
        WeChatBusinessNo fuweChatBusinessNo =  weChatBusinessNoRepository.findOne(wechatWebKey.getFuId());
        data.setAppId(fuweChatBusinessNo.getAppId());

        Long timestamp = System.currentTimeMillis() ;
        data.setTimestamp(timestamp);

        String noncestr = StringGeneratorUtil.generateString(5);
        data.setNonceStr(noncestr);

        String jsTicket= JsSdkUtils.getJsapiTicket(fuweChatBusinessNo);
        data.setSignature(JsSdkUtils.sign(jsTicket, url, noncestr, timestamp));
        
        return data ;
    }

4、签名制作

    /**
     *
     * 作者：  HealerJean
     * 日期:  2018/12/11 下午5:14.
     * 方法描述: 开始JS——SDK签名
     */
    public static String sign(String jsapi_ticket, String url,String noncestr ,Long timestamp) {
        //注意这里参数名必须全部小写，且必须有序
        String str = "jsapi_ticket=" + jsapi_ticket +
                "&noncestr=" + noncestr +
                "×tamp=" + timestamp +
                "&url=" + url;
        String  signature =   AesUtils.SHA1(str);
        return signature;
    }




    /**
     * 微信 校验 SHA1 加密
     *
     * @param decript
     * @return
     */
    public static String SHA1(String decript) {
        try {
            MessageDigest digest = MessageDigest
                    .getInstance("SHA-1");
            digest.update(decript.getBytes());
            byte messageDigest[] = digest.digest();
            // Create Hex String
            StringBuffer hexString = new StringBuffer();
            // 字节数组转换为 十六进制 数
            for (int i = 0; i < messageDigest.length; i++) {
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexString.append(0);
                }
                hexString.append(shaHex);
            }
            return hexString.toString();

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }